DOI: 10.1002/2016GL069650
论文题名: Seismic evidence for a change in the large-scale tomographic pattern across the D′′ layer
作者: Durand S. ; Debayle E. ; Ricard Y. ; Lambotte S.
刊名: Geophysical Research Letters
ISSN: 0094-8806
EISSN: 1944-8537
出版年: 2016
卷: 43, 期: 15 起始页码: 7928
结束页码: 7936
语种: 英语
英文关键词: core-mantle boundary
; global tomography
; large-scale heterogeneities
; normal mode cross-coupling
Scopus关键词: Shear flow
; Tomography
; Core-mantle boundary
; Cross-couplings
; Relative strength
; Scale heterogeneities
; Seismic evidence
; Shear velocities
; Spherical harmonics
; Velocity structure
; Chemical reactions
; core-mantle boundary
; harmonic analysis
; hot spot
; seismic method
; tomography
; velocity structure
英文摘要: We present SEISGLOB1, a pure SV tomographic model of Earth's mantle based on Rayleigh phase velocities and normal mode self- and cross-coupling data. SEISGLOB1 is the first model that incorporates the cross-coupling of normal modes since the pioneering work of Resovsky and Ritzwoller (1999). The simultaneous inversion of new cross-coupling normal modes and self-coupling of high-order normal modes measured by Deuss et al. (2013) and Stoneley modes measured by Koelemeijer et al. (2013) allows us to show that the velocity structure at the base of the mantle is more complex than that expected from a dominant spherical harmonic degree 2 and that the relative strength of odd degrees has previously been underestimated. Near the core-mantle boundary, the large low-shear-velocity provinces are less homogeneous than in previous studies, and various local maxima, often potentially associated with hot spot sources, are observed. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84982903293&doi=10.1002%2f2016GL069650&partnerID=40&md5=5d73c544c9859f387edbdb4fffbb20b5
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9769
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Laboratoire de Géologie de Lyon-Terre, Planètes, Environnement, CNRS, UMR 5276, École Normale Supérieure de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, Villeurbanne, France
Recommended Citation:
Durand S.,Debayle E.,Ricard Y.,et al. Seismic evidence for a change in the large-scale tomographic pattern across the D′′ layer[J]. Geophysical Research Letters,2016-01-01,43(15).